The discussion focuses on the phenomenon of stress and strain concentration in a rectangle subjected to pure shear loading, specifically when modeled using Finite Element Analysis (FEA). Despite the expectation of uniform deformation, the FEA results indicate stress concentrations at the bottom corners, which are identified as singularities. The participants question the presence of these singularities, noting that the fixed boundary condition at the bottom should not differentiate these corners from the other vertices. Understanding these singularities is crucial for accurate modeling and analysis in structural engineering.
PREREQUISITESStructural engineers, FEA analysts, and researchers focused on material behavior under shear loading conditions will benefit from this discussion.
Why should there be such singularities only on the bottom? In theory (uniform solution) the bottom corners aren't any different from the other 2 vertices. The fixed bottom is just the FEA boundary condition to prevent rigid body motions.Arjan82 said: